US20180155959A1 - Deadbolt latch assembly with latch sensor having wireless status indicator - Google Patents
Deadbolt latch assembly with latch sensor having wireless status indicator Download PDFInfo
- Publication number
- US20180155959A1 US20180155959A1 US15/831,094 US201715831094A US2018155959A1 US 20180155959 A1 US20180155959 A1 US 20180155959A1 US 201715831094 A US201715831094 A US 201715831094A US 2018155959 A1 US2018155959 A1 US 2018155959A1
- Authority
- US
- United States
- Prior art keywords
- deadbolt
- latch
- lock
- contact switch
- locked
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B17/00—Accessories in connection with locks
- E05B17/22—Means for operating or controlling lock or fastening device accessories, i.e. other than the fastening members, e.g. switches, indicators
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B17/00—Accessories in connection with locks
- E05B17/10—Illuminating devices on or for locks or keys; Transparent or translucent lock parts; Indicator lights
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B63/00—Locks or fastenings with special structural characteristics
- E05B63/0017—Locks with sliding bolt without provision for latching
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
- G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
- G08B5/36—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
- E05B2047/0048—Circuits, feeding, monitoring
- E05B2047/0057—Feeding
- E05B2047/0058—Feeding by batteries
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
- E05B2047/0048—Circuits, feeding, monitoring
- E05B2047/0067—Monitoring
- E05B2047/0069—Monitoring bolt position
Definitions
- the present disclosure pertains to detection and monitoring of the locking status of a deadbolt lock, and related methods, and more particularly to the remote monitoring of the locking status of the deadbolt lock by electronic devices.
- the present disclosure relates to electronic monitoring of a deadbolt door lock, or a door lock functionally similar to a deadbolt.
- the term “deadbolt lock” shall encompass any lock functionally similar or equivalent to a deadbolt.
- visual verification of the locked state requires the user to be physically near the deadbolt lock to determine whether or not the door is locked. It requires the user to move closer to the deadbolt lock for a more certain visual confirmation, or to attempt physically to move the door to determine if the deadbolt is indeed in the fully extended position and extended into the strike box. Even just looking at the thumb turn of a deadbolt lock may not confirm that the deadbolt lock is fully locked.
- this disclosure relates to an electronic system for monitoring the real-time state of a deadbolt lock as to whether the deadbolt is in an unlocked or locked state.
- the system and method allow for remote monitoring of the deadbolt lock through an electronic device rather than by physically viewing the deadbolt lock.
- a user can use an electronic device, such as a smart phone, tablet, personal computer, or security system to run program code or an application (“APP”) for interfacing with the deadbolt monitoring lock system.
- the deadbolt monitoring lock system can detect a state of the deadbolt assembly and transmit this information wirelessly to the electronic device of the user. In this way, the user does not need to be close enough to the deadbolt lock to be either to view the lock or to be in physical contact with it.
- FIG. 1 shows a partial exploded view of an embodiment where a deadbolt latch assembly comprises a deadbolt lock and a receiver mount bracket.
- FIGS. 2 and 3 show embodiments of an enclosure housing for a deadbolt lock monitoring system in accordance with this disclosure.
- FIG. 4 shows an exterior of an exemplary embodiment of the enclosure housing of the deadbolt lock monitoring system.
- FIG. 5 shows an embodiment of a deadbolt lock monitoring system mountable on a door.
- FIG. 6 shows an exploded view of components of the deadbolt lock monitoring system.
- FIG. 7 shows a sectional view of a latch assembly in an unlocked, or retracted, state.
- FIG. 8 shows a sectional view of a latch assembly in a locked, or extended, state.
- FIGS. 9A and 9B show perspective and plan views of the latch assembly in a fully extended state.
- FIGS. 10A and 10B show perspective and plan views of the latch assembly in a fully retracted state.
- FIGS. 11A and 11B show perspective and plan views of the deadbolt lock monitoring system in an assembled state.
- Embodiments can relate to at least one of a magnetic sensor and a contact switch, a contact switch, and a magnetic sensor.
- FIG. 1 illustrates an exemplary embodiment of components for a deadbolt lock monitoring system.
- FIG. 1 illustrates a partial exploded view of an embodiment where a deadbolt latch assembly 12 comprises a deadbolt 84 and a receiver mount bracket 15 .
- a switch advantageously a contact switch or a “micro” contact switch 20 , can be positioned and coupled to the receiver mount bracket 15 .
- One or more fasteners 24 may be used to secure the switch 20 to the deadbolt latch sub-assembly 12 .
- the switch 20 can have a connector 22 for connection with electronics for the deadbolt lock monitoring system, as described below with reference to FIGS. 3 and 4 .
- FIGS. 2 and 3 illustrate embodiments of an enclosure housing 30 for a lock-sensing module of the deadbolt lock monitoring system, as will be described below.
- the deadbolt latch assembly 12 can be configured to fit inside an opening of a door 42 , as known to one of ordinary skill in the art.
- FIG. 2 illustrates an embodiment with a cylindrical enclosure housing 30 .
- FIG. 3 illustrates an embodiment with a rectangular enclosure housing 30 . Alternative geometric shapes for fitment or aesthetic reasons can also be contemplated. Additional detailed embodiments for the deadbolt lock monitoring system are provided below with reference to FIGS. 5-11B .
- a key cylinder assembly portion of the deadbolt lock can be coupled to the deadbolt latch assembly 12 on a first, or an exterior, side of the door.
- the key cylinder assembly portion can have a key cylinder driver blade 72 coupled to the deadbolt latch assembly 12 .
- the key cylinder driver blade 72 can be inserted and oriented to move the deadbolt to the extended and retracted position freely and without binding or excessive torque on a key used to actuate the deadbolt's movement.
- the connector 22 from the switch 20 can be passed through an opening 23 in the mounting plate 76 .
- the deadbolt assembly can be secured to the door with fasteners, such as concealed screws 74 through holes in a mounting plate 76 , or by any other suitable fastening means.
- the factory pre-assembled interior enclosure housing 30 can be secured to the mounting plate 76 on the door 12 by one or more fasteners 31 .
- a thumb turn 80 can be attached to a shaft 82 coupled to the deadbolt latch assembly 12 , such as by a mechanical fastener 78 .
- the shaft 82 can protrude through the enclosure housing 30 such that the thumb turn 80 is readily accessible.
- FIG. 4 illustrates an exterior of an exemplary embodiment of the enclosure housing 30 of the deadbolt lock monitoring system, wherein the enclosure housing has a smooth surface without provision for physical actuation on one side of the door.
- the enclosure housing having a side without physical actuation can replace one of either the thumb turn 80 or the key cylinder assembly.
- the enclosure housing 30 which can be either a generally round or rectangular configuration, can be positioned on one side of the deadbolt lock assembly.
- the enclosure housing 30 can have an RF window 32 to accommodate RF transmissions from an antenna, as described below.
- the enclosure housing can house the electronics necessary for communication between the switch 20 and an external electronic device, such as a phone, tablet, personal computer, or security system.
- the housing contains the electronics components comprising a lock-sensing module in accordance with embodiments of the disclosure.
- the lock-sensing module may include all, or at least one of, a central processing unit (CPU), computer readable storage, a wireless communication chip/module, such as Bluetooth® and related circuity to connect with a controller unit, such as the CPU or an external controller, an antenna 63 that can be contained within the enclosure housing 30 or extend out of the enclosure housing 30 , a power source, and an indicator light 60 .
- the power source can be hardwired or a user replaceable battery, such as an off the shelf Lithium-Ion battery 55 or like power source.
- the replaceable battery can be a coin battery.
- the indicator light 60 can be an LED indicator light visible on the surface 67 of the enclosure housing 30 .
- the indicator light 60 can comprise multiple colors to indicate the Locked or Unlocked condition, and/or alternatively the indicator light can be a single color, such as for indication of turned ON or OFF or to indicate a Locked or Unlocked condition.
- the indicator light may also flash in one or more selected frequencies to indicate a problem, and/or to confirm the pairing process between
- a user can use an electronic device, such as a phone, tablet, personal computer, or security system to run program code or an application (“APP”) for interfacing with the deadbolt lock monitoring system.
- an electronic device such as a phone, tablet, personal computer, or security system to run program code or an application (“APP”) for interfacing with the deadbolt lock monitoring system.
- Multiple devices can be interfaced with the deadbolt lock monitoring system.
- Embodiments may provide for an intermediary electronic device, such as a security system, which can then relay the status of the deadbolt lock monitoring system to additional electronic devices.
- Initial pairing of the electronic device and the deadbolt lock monitoring system is described in further detail below. After the deadbolt assembly portion is installed, the user can use the APP on the electronic device to interface with the deadbolt lock monitoring system.
- At least one of the APP of the electronic device or the indicator light 60 can provide guidance to the user through the pairing process.
- the indicator light 60 can flash in a certain color and/or flash in a predetermined sequence to indicate when the lock is in “Pairing” mode, and when the Pairing is successfully accomplished.
- the switch (sensor) 20 When the deadbolt 84 is fully extended, which corresponds to a locked position of the deadbolt, the switch (sensor) 20 is triggered (activated). The triggered switch can then send a signal indicating a change of the internal status (Unlocked) of the lock to “Locked.” When the deadbolt's position is changed (retracted or partially or fully retracted), the switch 20 is no longer activated. When the switch is no longer triggered, it can then change the internal status of the lock to “Unlocked.” Therefore, whenever there is an internal status change, regardless of whether the status changed to “Locked” or “Unlocked,” a transmission of the new status can be broadcasted to all paired electronic devices.
- the LED indicator light 60 can either change colors, or illuminate (or un-illuminate) depending on the status of the lock.
- the user can open the APP on the electronic device, such as a smartphone or tablet, and query the lock of its status.
- the lock is connected to a security system with an external connection, such as via the internet, the user may access the status from any location.
- the indicated status of the deadbolt's condition/position may only provide a notification of its current status to the paired device via the APP.
- the APP can allow for the user to use the electronic device to issue other commands to the lock other than inquiring about the lock's current status.
- the system can provide a battery state update.
- a notification of a “Battery Status,” indicating the status of the battery will be transmitted whenever the status of the lock is changed or whenever the user queries the lock for its status. For instance, when the battery reaches the next battery level (in 5% or 10% increments), that is, whenever the status of the lock is changed or the user queries for the lock status, in addition to broadcasting the lock status, an updated notification of the battery status will also be transmitted to the paired devices via the APP.
- the LED indicator light 60 can either change to a different color and/or flash in a pre-determined sequence to indicate that the battery is low and needs replacing.
- FIG. 5 illustrates an embodiment of a deadbolt lock monitoring system 10 mountable on a door.
- the deadbolt lock monitoring system 10 includes an inside thumb turn assembly 100 mountable on an inside face of the door, an outside cylinder assembly 200 mountable on the outside face of the door, a strike plate assembly 300 mountable on a door jamb/frame, and a latch assembly 400 mountable through an edge of the door.
- the inside thumb turn assembly 100 includes an inside housing 110 with an RF window 115 , a thumb-turn lever 120 , a wireless communication chip/module 130 using Bluetooth® (e.g. Bluetooth® 5.0), related circuity with a microcontroller unit (MCU) or central processing unit (CPU) and computer readable storage 135 , an antenna 140 , a battery 145 (e.g., a lithium-ion coin cell battery or other user replaceable off-the-shelf battery) as a power source, a light emitting diode (LED) indicator light 150 visible on the surface of the inside housing 110 , a reset button 155 accessible for actuation through a small aperture 112 located on the outer surface of the inside housing, and an inside housing connector 160 to connect circuitry within the inside housing 110 with the latch connector 485 of the latch assembly 400 as further discussed below.
- the computer readable storage can include storing program code configured to retrieve or receive information from inputs and transit information. Additional detail regarding the latch assembly 400 is provided below with respect to FIGS. 5
- the wireless communication chip/module 130 can be a Bluetooth® transmitter.
- other communication methods such as Wi-Fi®, can be envisioned.
- the LED light 150 can be in multiple colors to indicate locked and unlocked conditions. Alternatively, the LED light 150 can be a single color, turned either ON or OFF, to indicate the locked or unlocked condition. The LED light 150 may also flash either to indicate a problem or to confirm a pairing process.
- a reset button 155 can be used in the initial pairing of the deadbolt lock monitoring system 10 to a remote wireless Bluetooth compatible electronic device, such as a smartphone, tablet, personal computer, security system, etc., or to restore the deadbolt lock monitoring system 10 to factory default conditions.
- a remote wireless Bluetooth compatible electronic device such as a smartphone, tablet, personal computer, security system, etc.
- the outside cylinder assembly 200 can include an outside housing 210 , a protection shield 220 , an outside cylinder 240 , and a tailpiece 230 coupled to the outside cylinder 240 .
- the tailpiece 230 can extend through a cam (not shown) of the latch assembly and can engage the thumb-turn lever 120 .
- the tailpiece 230 can rotate when the outside cylinder 240 is turned with a key or when the thumb-turn lever 120 is operated by a user. Rotation of the tailpiece 230 in one direction can rotate the cam of the latch assembly 400 to extend a deadbolt of the latch assembly 400 , and rotation of the tailpiece 230 in an opposite direction can rotate the cam to retract the deadbolt, as explained in further detail below.
- the deadbolt of the latch assembly 400 can extend into the strike plate assembly 300 to secure the door in a closed position and in a locked state.
- the outside cylinder assembly 200 can first be attached to the mounting plate 190 of the inside thumb turn assembly 100 .
- the latch assembly 400 can extend through the edge of the door and is partially exposed by a hole extending through the inside and outside surface of the door.
- the protection shield 220 which may also be known as an anti-pry shield, extends at least partly into the hole to prevent a tool from access to the latch assembly 400 .
- the outside housing 210 can fit over the protection shield 220 .
- the protective shield may have an outer rim seated against or adjacent to the perimeter of the hole on the outside face of the door.
- a pair of fasteners can be inserted through the inside housing and threaded into the outside cylinder 240 to draw the outside cylinder assembly 200 and the inside thumb-turn assembly 100 together against the outside and inside faces of the door, respectively.
- the outside cylinder 240 can urge the outside housing 210 towards the door to secure the protection shield 220 between the door and the outside housing 210 thereby covering or preventing access to the fasteners or the latch assembly 400 .
- the deadbolt can be retracted to an unlocked state and extended to a locked state by turning the thumb-turn lever 120 inside the door or by turning a key (not shown) inserted into the outside cylinder 240 from outside the door.
- the RF window 115 of the inside housing 110 can accommodate RF transmission from the antenna 140 .
- the shape of the inside housing 110 can be generally cylindrical, rectangular, or any other suitable shape.
- the inside cavity of the inside housing 110 is large enough to house at least one of the wireless communication chip/module 130 , related circuity to connect with the CPU 135 , the antenna 140 , the battery 145 , the LED indicator light 150 , the reset button 155 accessible for actuation through a small aperture located on the outer surface of the inside housing 110 , and the inside housing connector 160 .
- FIG. 6 illustrates an exploded view of components of the deadbolt lock monitoring system.
- the strike plate assembly 300 can extend into the door jamb and can include a dust box 310 , a reinforcement plate 320 , and a strike plate 330 .
- the strike plate 330 when installed to the door jamb, can be generally flush with the surface of the door jamb.
- the reinforced plate 320 can typically be much stronger than the strike plate 330 .
- two very long screws are passed through openings on opposite sides of the reinforced plate 320 and the dust box 310 , and into a wooden stud outside the door frame to make it more difficult for a person to kick the door open. Shorter screws may not extend deep enough into the stud to prevent the shorter screws from being ripped away from the door jamb. Regular short fasteners can then be used to attach the strike plate to the door jamb against the reinforcement plate 320 .
- Other suitable fastening elements or device may suggest themselves for the above-described purposes to those skilled in the pertinent arts.
- a channel 301 can extend through an opening of the strike plate 330 , an opening of the reinforcement plate 320 , and an opening of the dust box 310 into a cavity 315 of the dust box 310 to allow the deadbolt of the latch assembly 400 to fully extend into the dust box 310 .
- the deadbolt when fully extended, should loosely fit through the channel 301 through the strike plate 330 , the reinforcement plate 320 , and the dust box 310 .
- a magnet 350 may advantageously be attached to the inside or outside a bottom opposite the opening of the dust box 310 to trigger a magnetometer or magnetic sensor in the latch assembly 400 .
- the magnetometer or magnetic sensor if present, can be located within the deadbolt. However, the magnetometer or magnetic sensor may also be located inside the inside housing 110 or form a part of the inside thumb-turn assembly 100 , such as the lever.
- the deadbolt can be close to or in contact with the magnet 350 only when the deadbolt is fully extended, so that the magnetic sensor within the deadbolt can detect the presence of the magnet 350 when the deadbolt is fully extended. If no dust box 310 is used, the dust box 310 does not have a bottom, or the design dictates the magnet 350 be placed elsewhere, such as a side of the dust box 310 , then the magnet 350 can be positioned anywhere adjacent the latching assembly 400 , so long as the magnetic sensor can detect the magnet when the deadbolt is fully extended and the door is closed, or simply when the door is closed.
- the latch assembly 400 can include a latch housing 410 , a faceplate subassembly 401 comprising an adjustment casing 404 having a helical slot 405 coupled to the housing 410 , a faceplate adapter 406 fixed to the adjustment casing 404 , and a faceplate 402 attached to the faceplate adapter, a deadbolt 430 and a driver 450 coupled together and slidable within the latch housing 410 , and a latch cam 470 for moving the deadbolt 430 relative to the latch housing 410 between an unlocked position and a locked position by rotation of the latch cam 470 .
- the driver 450 can include a hollow first (cylindrical) portion 451 and a second (longitudinal) portion 455 extending away the cylindrical portion 451 .
- a channel 452 may extend in a helical fashion a half revolution around the cylindrical portion for adjusting the position of the deadbolt relative to the driver as discussed further below. This can allow the latch assembly 400 to be fitted on doors having a different backset, which is the distance between the edge of the door and the center of the lock hole on the door.
- the channel 452 may also be a through-hole.
- a slot 456 may be defined in the longitudinal portion 455 of the driver 450 for receiving a tail of the latch cam 470 to drive the deadbolt 430 between the locked position and the unlocked position.
- a driver guide 457 extending from the driver 450 can be slidably captured in a driver guide slot 412 of the housing 410 to ensure the driver 450 moves in a linear direction.
- the driver guide 457 may also activate a switch in the fully extended and/or fully retracted position detailed below.
- FIGS. 6-8 illustrate the various components of an embodiment of the deadbolt assembly 400 .
- the latch cam 470 includes a cylindrical body 471 and a tail 475 extending from the cylindrical body 471 into the slot 124 .
- the cylindrical body 471 can rotate inside a pair of circular holes 414 of the latch housing 410 .
- the holes 414 are aligned along a rotation axis.
- the cylindrical body 471 has a slot through which the tailpiece 230 of the outside cylinder assembly 200 extends.
- the rotation of the thumb-turn lever 120 or rotation of a key inserted in the outside cylinder 240 causes the tailpiece 230 to rotate, which then causes the latch cam 470 to rotate.
- the latch cam 470 rotates the tail 475 towards the direction of the deadbolt 430 until it presses against an edge of the slot 456 in the driver 450 to move the driver 450 to extend the deadbolt 430 .
- the latch cam can be rotated until the deadbolt is fully extended to a locking state. Rotation of the latch cam to rotate the tail in a direction away from the deadbolt causes the tail to press against an opposite edge of the slot in the driver to urge the driver to retract the deadbolt. Movement of the driver 450 also moves the driver guide 457 . In the locked state with the deadbolt fully extended, the driver guide 457 can contact a first switch. In some embodiments, in the unlocked state with the deadbolt fully retracted, the driver guide 457 can contact a second switch.
- the deadbolt 430 has an internal cavity 432 with an opening 431 at a first end and a through hole 435 at an opposite second end.
- the cylindrical portion 451 of the driver 450 extends axially through the opening 431 and into the internal cavity 432 .
- a securing pin 440 extends laterally through a sidewall of the deadbolt 430 and directly into the channel 452 of the driver 450 to couple the deadbolt 430 to the driver 450 . With the pin 440 secured to the deadbolt 430 , the deadbolt 430 can rotate spirally about the driver 450 as the pin 440 slides inside the channel 452 to adjust the backset.
- the faceplate subassembly 401 rotates spirally about the latch housing 410 guided by a protrusion on a surface of the latch housing 410 inside the helical slot 405 .
- the face of the deadbolt 430 is maintained at the same position relative to the faceplate 402 regardless of the desired backset.
- a proximity sensor 480 such as magnetometer or a magnetic (e.g., Hall effect) sensor, may be fixed within the through hole of the deadbolt and flush or slightly recessed from a surface of the deadbolt. If a magnetic sensor is used, it is configured to detect the presence of a magnetic field, and it can be combined with other components to form a Hall effect switch. For example, when the magnetic flux from the magnetic field passing through the magnetic sensor 480 exceeds a preset value, the output switches quickly between an “OFF” condition to an “ON” condition without any contact bounce. Built-in hysteresis can eliminate any oscillation of the output signal as the magnetic sensor moves in and out of the magnetic field.
- a magnetic sensor e.g., Hall effect
- the magnet located at or near the first end of the magnetic sensor 480 will trigger the Hall effect switch to indicate that the door is closed shut and locked. If the deadbolt is in the locked position but not engaged in the strike plate assembly 300 , the Hall effect switch would remain in the “OFF” condition, indicating the door is not closed. Simply, if the magnetic sensor encounters a magnetic field, a closed door is detected, and if no magnetic field is encountered, an open door is detected.
- the magnetic sensor 480 may be protected by a protective housing 481 , which, in turn, may be surrounded by an anti-cut roller 483 to prevent hacking the deadbolt 430 .
- a spring 484 can bias the roller 483 away from the driver 450 in order to maintain its position to prevent hacking.
- a wired connector 485 of the magnetic sensor 480 can be routed from inside the internal cavity of the deadbolt 430 out the opening and through the cylindrical portion 451 of the driver 450 and the latch housing 410 .
- the wired connector can include a wire to a power supply (e.g., +5 VDC), a ground return, and a signal wire.
- the signals through the signal wire can be an output voltage proportional (e.g., half) to the voltage between the power supply and ground.
- a grommet 482 can prevent wires of the magnetic sensor 480 from damage against the latch housing 410 as the deadbolt 430 retracts and extends.
- proximity sensors instead of using a magnetic sensor as a proximity sensor, as described above, other types of proximity sensors could be used, such as a contact sensor, a capacitive sensor, or an optical sensor. The modifications needed to accommodate these alternative proximity sensors will readily suggest themselves to those skilled in the pertinent arts.
- the battery 145 can supply power to the at least one contact switch 490 , the proximity sensor 480 , the light 150 , the CPU 135 , and the other electrical components.
- the output signals from the contact switches 490 and the proximity sensor 480 can be processed in the CPU to determine and control the appropriate color of the light 150 as explained below.
- FIGS. 7 and 8 illustrate sectional views of the latch assembly 400 , in which the proximity sensor is a magnetic sensor 480 , as described above.
- FIG. 7 illustrates a view in an unlocked, or retracted, state
- FIG. 8 illustrates a view in a locked, or extended, state.
- the deadbolt is in the fully retracted state, such that the sensor 480 is spaced apart from the magnet 350 .
- the magnetic sensor 480 is in a state that does not meet the predetermined threshold value for indication of a locked state.
- the deadbolt is in the fully extended state, such that the magnetic sensor 480 is at a closest position to the magnet 350 .
- the magnet located at or near the first end of the magnetic sensor 480 will provide a sufficient magnetic reading by the magnetic sensor to meet the predetermined threshold value to indicate that the door is closed shut and locked.
- FIGS. 9A and 9B illustrate perspective and plan views of the latch assembly 400 in a fully extended state.
- at least one contact switch 490 which acts as a sensor when activated, can be used in combination with a Hall effect switch (as described above) to reduce false readings and to provide additional information.
- the contact switch 490 can be positioned adjacent to or within the housing 410 , such that the driver guide 457 , which is slidably received in the driver guide slot 412 of the latch housing 410 , can activate the contact switch 490 when the deadbolt 430 is in the fully extended position.
- the contact switch 490 can be mounted on a switch support 495 , which is attached to the housing 410 .
- a connector for the contact switch 490 can be shared with the wired connector 485 for the magnetic sensor.
- the wired connector 485 can be passed through the mounting plate 190 for connection with the inside housing connector 160 .
- the combination of the contact switch 490 and the Hall effect switch can sufficiently determine the status of the door. Only when the contact switch 20 and the Hall effect switch are activated or switched to the “ON” condition, is the door fully secured with the deadbolt 110 fully extended inside the strike plate assembly 300 . To conserve power, the deadbolt monitoring system 10 can be operated so that power is supplied to the Hall effect switch after the contact switch 20 is activated. To detect if the door is closed with the door remaining in an unlocked state, a “check” can be performed by the deadbolt 430 being temporarily thrown to the locked position and quickly withdrawn back to the unlocked position to determine if the Hall effect switch registers the magnet in the strike plate assembly.
- FIGS. 10A and 10B illustrate perspective and plan views of the latch assembly 400 in a fully retracted state.
- a second contact switch 490 can be provided for indication of a fully retracted state.
- the second contact switch 490 can be located adjacent to or within the housing 410 , or supported by the switch support 495 such that the driver guide 457 can activate the first contact switch 490 when the deadbolt 430 is in the fully retracted position.
- the deadbolt 430 is in an intermediary location, neither fully retracted nor fully extended. In this situation, an error is determined.
- the time it takes to change from one position to the other may indicate that the battery is low, or that a motor, if present, is failing, or that there is undesirable friction in the deadbolt, or that other electrical or mechanical problems may be present.
- FIGS. 11A and 11B illustrate perspective and plan views of the deadbolt lock monitoring system in an assembled state.
- the deadbolt lock monitoring lock system can be interfaced with a user's electronic device through program code, or an application (“APP”).
- APP application
- the initial pairing set up can begin with the user first downloading the APP to the remote wireless communication electronic device or devices, e.g. smartphone, tablet, personal computer, or security system.
- the APP may advantageously provide a simple user interface or a screen display showing the status (Locked or Unlocked) of one or more deadbolt locks as defined/described by the user during the initial set-up of the APP.
- the APP display can also show the Charge status of the battery 145 for each deadbolt that has been previously paired with the smartphone/tablet and that is within wireless connectivity range.
- the APP can be program code configured to access a connection with the deadbolt lock monitoring system.
- the APP can then either automatically receive information from the deadbolt lock monitoring system, or send a query to retrieve the information.
- the APP can then display the information through the user interface of the electronic device.
- an installer can install the key cylinder assembly portion of the deadbolt lock on the exterior side of the door.
- the next step is to confirm the tailpiece 230 is properly inserted and oriented to move the deadbolt 430 between the extended (locked) and retracted (unlocked) positions freely and without binding or excessive torque on the key to actuate the deadbolt's movement.
- the contact switch(es) 490 may be positioned and secured to the support bracket 495 .
- One or more fasteners may be used to ensure each of the switches 490 is securely affixed to the latch housing 410 .
- the next step is to pass the first connector 485 from the contact switch 490 and the sensor 480 through an opening in a mounting plate 190 , and install fasteners (e.g., concealed screws) through the holes in mounting plate 190 to secure the outside cylinder assembly 200 to the door.
- fasteners e.g., concealed screws
- the inside thumb turn assembly 100 having been previously paired to the remote wireless device(s), is next secured to the mounting plate 190 on the door by snapping onto the mounting plate 190 or by one or more fasteners (not shown).
- the next step is to attach the thumb-turn lever 120 to a shaft protruding through the inside housing 110 , if necessary.
- the user can then launch the APP on the remote wireless device and then press the reset button in the enclosure housing to initiate the paring process.
- the APP will then guide the user through the pairing process.
- the LED indicator light may be operable either to flash in a certain color and/or flash in a predetermined sequence to indicate when the lock is in a “pairing” mode, and when the pairing is successfully accomplished.
- a user can use an electronic device, such as a phone, tablet, personal computer, or security system to run an application for interfacing with the deadbolt lock monitoring system.
- an electronic device such as a phone, tablet, personal computer, or security system
- Embodiments may provide for an intermediary electronic device, such as a security system, which can then relay the status of the deadbolt lock monitoring system to additional electronic devices.
- Initial pairing of the electronic device and the deadbolt lock monitoring system is described in further detail below. After the deadbolt assembly portion is installed, the user can use the application on the electronic device to interface with the deadbolt lock monitoring system. For initial set up, there can be a reset button 155 provided with the housing 110 to initiate the pairing process.
- At least one of the application of the electronic device or the indicator light 150 can provide guidance to the user through the pairing process.
- the indicator light 150 can flash in a certain color and/or flash in a predetermined sequence to indicate when the lock is in “Pairing” mode and when the Pairing is successfully accomplished.
- the sensor 480 and the switch 490 are triggered (activated).
- the triggered switch can then send a signal indicating a change of the internal status (Unlocked) of the lock to “Locked.”
- the sensor 480 and the switch 490 are no longer activated.
- the internal status of the lock is changed to “Unlocked.” Therefore, whenever there is an internal status change, regardless of whether the status changed to “Locked” or “Unlocked,” a transmission of the new status can broadcast to all paired electronic devices.
- the LED indicator light 150 can either change colors, or illuminate (or un-illuminate) depending on the status of the lock.
- the user can open the application on the electronic device, such as a smartphone or tablet, and query the lock of its status.
- the lock is connected to a security system with an external connection, such as via the internet, the user may access the status from any location.
- the status of the deadbolt's condition/position may only provide a notification of its current status to the paired device via the application, and the application may optionally be configured to allow the user to use the electronic device to issue commands to the lock other than inquiring about the lock's current status.
- the system can provide a battery state update.
- a notification of a “Battery Status,” indicating the status of the battery will be transmitted whenever the status of the lock is changed or whenever the user query the lock for its status. So in other words, when the battery reaches the next battery level (in 5% or 10% increments), that is, whenever the status of the lock is changed or the user query for the lock status, in addition to broadcasting the lock status, an updated notification of the battery status will also be transmitted to the paired devices via the application.
- the LED indicator light 150 can either change to a different color and/or flash in a pre-determined pattern to indicate that the battery is low and needs replacing.
- Embodiments of the disclosure can thus provide a method of remotely determining the locked or unlocked status of a lock latch.
- the method can include receiving information related to the position of the lock latch from a position detector, determining whether the lock latch is in a locked or an unlocked state from the information, and transmitting the determined locked or unlocked state through a transmitter to a remote electronic device.
- the method can include, wherein the information from the position detector comprises a position signal having a first value when the detected position of the lock latch is in the unlocked state and a second value when the detected position of the lock latch is in the locked state.
- deadbolt monitoring locking system Although limited embodiments of the deadbolt monitoring locking system, its components, and related methods have been specifically described and illustrated herein, many modifications and variations will be apparent to those skilled in the art. Furthermore, it is understood and contemplated that features specifically discussed for one embodiment may be adopted for inclusion with another embodiment when appropriate. Accordingly, it is to be understood that the deadbolt monitoring locking system, its components, and related methods constructed according to principles of the disclosed devices and methods may be embodied other than as specifically described herein. The disclosure is also defined in the following claims.
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Abstract
Description
- This application claims priority, under 35 U.S.C. § 119(e), from U.S. Provisional Application No. 62/429,447, filed Dec. 2, 2016, the disclosure of which is incorporated herein by reference in its entirety.
- Not Applicable.
- The present disclosure pertains to detection and monitoring of the locking status of a deadbolt lock, and related methods, and more particularly to the remote monitoring of the locking status of the deadbolt lock by electronic devices.
- Users of a standard/traditional key-operated single-cylinder mechanical deadbolt lock mounted on residential doors need to move within visual or physical contact proximity of the inside thumb-turn assembly of the deadbolt lock to determine if the deadbolt of the lock is extended into the strike plate assembly mounted on the door jamb. The position of the thumb-turn lever on the interior side of the lock typically provides a visual reference to the deadbolt being in the fully extended (“locked”) position, fully retracted (“unlocked”) position, or a position between the fully extended and fully retracted position. Moreover, even with visual confirmation of the thumb-turn lever in the fully extended position, the deadbolt may not be fully extended into the strike box of the strike plate assembly, such as when the door is slightly ajar. Further confirmation of the locked state requires the user to move closer to the deadbolt lock for a more certain visual confirmation or by physically attempting to move the door to determine if the deadbolt is indeed in the fully extended position and extended into the strike box.
- The present disclosure relates to electronic monitoring of a deadbolt door lock, or a door lock functionally similar to a deadbolt. (For the purpose of this disclosure, the term “deadbolt lock” shall encompass any lock functionally similar or equivalent to a deadbolt.) Traditionally, visual verification of the locked state requires the user to be physically near the deadbolt lock to determine whether or not the door is locked. It requires the user to move closer to the deadbolt lock for a more certain visual confirmation, or to attempt physically to move the door to determine if the deadbolt is indeed in the fully extended position and extended into the strike box. Even just looking at the thumb turn of a deadbolt lock may not confirm that the deadbolt lock is fully locked.
- Broadly, this disclosure relates to an electronic system for monitoring the real-time state of a deadbolt lock as to whether the deadbolt is in an unlocked or locked state. The system and method allow for remote monitoring of the deadbolt lock through an electronic device rather than by physically viewing the deadbolt lock.
- In operation, a user can use an electronic device, such as a smart phone, tablet, personal computer, or security system to run program code or an application (“APP”) for interfacing with the deadbolt monitoring lock system. The deadbolt monitoring lock system can detect a state of the deadbolt assembly and transmit this information wirelessly to the electronic device of the user. In this way, the user does not need to be close enough to the deadbolt lock to be either to view the lock or to be in physical contact with it.
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FIG. 1 shows a partial exploded view of an embodiment where a deadbolt latch assembly comprises a deadbolt lock and a receiver mount bracket. -
FIGS. 2 and 3 show embodiments of an enclosure housing for a deadbolt lock monitoring system in accordance with this disclosure. -
FIG. 4 shows an exterior of an exemplary embodiment of the enclosure housing of the deadbolt lock monitoring system. -
FIG. 5 shows an embodiment of a deadbolt lock monitoring system mountable on a door. -
FIG. 6 shows an exploded view of components of the deadbolt lock monitoring system. -
FIG. 7 shows a sectional view of a latch assembly in an unlocked, or retracted, state. -
FIG. 8 shows a sectional view of a latch assembly in a locked, or extended, state. -
FIGS. 9A and 9B show perspective and plan views of the latch assembly in a fully extended state. -
FIGS. 10A and 10B show perspective and plan views of the latch assembly in a fully retracted state. -
FIGS. 11A and 11B show perspective and plan views of the deadbolt lock monitoring system in an assembled state. - The detailed description set forth below in connection with the appended drawings is intended as a description of the presently preferred embodiments of the deadbolt lock monitoring system provided in accordance with aspects of the present components, assemblies, and method. It is not intended to represent the only forms in which the present components, assemblies, and method may be constructed or utilized. The description sets forth the features and the steps for constructing and using the embodiments of the present components, assemblies, and method in connection with the illustrated embodiments. It is to be understood, however, that the same or equivalent functions and structures may be accomplished by different embodiments that are also intended to be encompassed within the spirit and scope of the present disclosure. As denoted elsewhere herein, like element numbers are intended to indicate like or similar elements or features. Embodiments can relate to at least one of a magnetic sensor and a contact switch, a contact switch, and a magnetic sensor.
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FIG. 1 illustrates an exemplary embodiment of components for a deadbolt lock monitoring system.FIG. 1 illustrates a partial exploded view of an embodiment where adeadbolt latch assembly 12 comprises adeadbolt 84 and areceiver mount bracket 15. A switch, advantageously a contact switch or a “micro”contact switch 20, can be positioned and coupled to thereceiver mount bracket 15. One ormore fasteners 24 may be used to secure theswitch 20 to thedeadbolt latch sub-assembly 12. Theswitch 20 can have aconnector 22 for connection with electronics for the deadbolt lock monitoring system, as described below with reference toFIGS. 3 and 4 . -
FIGS. 2 and 3 illustrate embodiments of anenclosure housing 30 for a lock-sensing module of the deadbolt lock monitoring system, as will be described below. Thedeadbolt latch assembly 12 can be configured to fit inside an opening of a door 42, as known to one of ordinary skill in the art.FIG. 2 illustrates an embodiment with acylindrical enclosure housing 30.FIG. 3 illustrates an embodiment with arectangular enclosure housing 30. Alternative geometric shapes for fitment or aesthetic reasons can also be contemplated. Additional detailed embodiments for the deadbolt lock monitoring system are provided below with reference toFIGS. 5-11B . - A key cylinder assembly portion of the deadbolt lock can be coupled to the
deadbolt latch assembly 12 on a first, or an exterior, side of the door. The key cylinder assembly portion can have a keycylinder driver blade 72 coupled to thedeadbolt latch assembly 12. The keycylinder driver blade 72 can be inserted and oriented to move the deadbolt to the extended and retracted position freely and without binding or excessive torque on a key used to actuate the deadbolt's movement. - The
connector 22 from theswitch 20 can be passed through an opening 23 in themounting plate 76. The deadbolt assembly can be secured to the door with fasteners, such as concealedscrews 74 through holes in amounting plate 76, or by any other suitable fastening means. The factory pre-assembledinterior enclosure housing 30 can be secured to themounting plate 76 on thedoor 12 by one ormore fasteners 31. Athumb turn 80 can be attached to ashaft 82 coupled to thedeadbolt latch assembly 12, such as by amechanical fastener 78. Theshaft 82 can protrude through theenclosure housing 30 such that thethumb turn 80 is readily accessible. -
FIG. 4 illustrates an exterior of an exemplary embodiment of the enclosure housing 30 of the deadbolt lock monitoring system, wherein the enclosure housing has a smooth surface without provision for physical actuation on one side of the door. The enclosure housing having a side without physical actuation can replace one of either the thumb turn 80 or the key cylinder assembly. - The enclosure housing 30, which can be either a generally round or rectangular configuration, can be positioned on one side of the deadbolt lock assembly. The
enclosure housing 30 can have anRF window 32 to accommodate RF transmissions from an antenna, as described below. The enclosure housing can house the electronics necessary for communication between theswitch 20 and an external electronic device, such as a phone, tablet, personal computer, or security system. Thus, the housing contains the electronics components comprising a lock-sensing module in accordance with embodiments of the disclosure. Specifically, for example, the lock-sensing module may include all, or at least one of, a central processing unit (CPU), computer readable storage, a wireless communication chip/module, such as Bluetooth® and related circuity to connect with a controller unit, such as the CPU or an external controller, an antenna 63 that can be contained within theenclosure housing 30 or extend out of theenclosure housing 30, a power source, and anindicator light 60. The power source can be hardwired or a user replaceable battery, such as an off the shelf Lithium-Ion battery 55 or like power source. In an exemplary embodiment, the replaceable battery can be a coin battery. The indicator light 60 can be an LED indicator light visible on thesurface 67 of theenclosure housing 30. The indicator light 60 can comprise multiple colors to indicate the Locked or Unlocked condition, and/or alternatively the indicator light can be a single color, such as for indication of turned ON or OFF or to indicate a Locked or Unlocked condition. The indicator light may also flash in one or more selected frequencies to indicate a problem, and/or to confirm the pairing process between - In operation, a user can use an electronic device, such as a phone, tablet, personal computer, or security system to run program code or an application (“APP”) for interfacing with the deadbolt lock monitoring system. Multiple devices can be interfaced with the deadbolt lock monitoring system. Embodiments may provide for an intermediary electronic device, such as a security system, which can then relay the status of the deadbolt lock monitoring system to additional electronic devices. Initial pairing of the electronic device and the deadbolt lock monitoring system is described in further detail below. After the deadbolt assembly portion is installed, the user can use the APP on the electronic device to interface with the deadbolt lock monitoring system. For initial set up, there can be a reset button 70 provided on the
enclosure housing 30 to initiate the pairing process. At least one of the APP of the electronic device or the indicator light 60 can provide guidance to the user through the pairing process. For example, the indicator light 60 can flash in a certain color and/or flash in a predetermined sequence to indicate when the lock is in “Pairing” mode, and when the Pairing is successfully accomplished. - When the
deadbolt 84 is fully extended, which corresponds to a locked position of the deadbolt, the switch (sensor) 20 is triggered (activated). The triggered switch can then send a signal indicating a change of the internal status (Unlocked) of the lock to “Locked.” When the deadbolt's position is changed (retracted or partially or fully retracted), theswitch 20 is no longer activated. When the switch is no longer triggered, it can then change the internal status of the lock to “Unlocked.” Therefore, whenever there is an internal status change, regardless of whether the status changed to “Locked” or “Unlocked,” a transmission of the new status can be broadcasted to all paired electronic devices. This can be done via the APP for all electronic devices within communication range of the deadbolt. This transmission can be configured to occur whenever the lock status has changed and regardless if any paired devices are within range. The LED indicator light 60 can either change colors, or illuminate (or un-illuminate) depending on the status of the lock. - At any time, when the user and a paired electronic device is within communication range of the lock, the user can open the APP on the electronic device, such as a smartphone or tablet, and query the lock of its status. Alternatively, if the lock is connected to a security system with an external connection, such as via the internet, the user may access the status from any location. The indicated status of the deadbolt's condition/position may only provide a notification of its current status to the paired device via the APP.
- In some embodiments, the APP can allow for the user to use the electronic device to issue other commands to the lock other than inquiring about the lock's current status.
- In the case where the deadbolt lock monitoring lock system uses a battery power source, the system can provide a battery state update. Whenever the battery state of charge falls to a predetermined level or threshold (e.g. starting at 100% and stepping down in either 5% or 10% increments), a notification of a “Battery Status,” indicating the status of the battery, will be transmitted whenever the status of the lock is changed or whenever the user queries the lock for its status. For instance, when the battery reaches the next battery level (in 5% or 10% increments), that is, whenever the status of the lock is changed or the user queries for the lock status, in addition to broadcasting the lock status, an updated notification of the battery status will also be transmitted to the paired devices via the APP.
- In some embodiments, when the battery charge level is at predetermined minimum threshold (e.g., at 5% battery remaining), the LED indicator light 60 can either change to a different color and/or flash in a pre-determined sequence to indicate that the battery is low and needs replacing.
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FIG. 5 illustrates an embodiment of a deadbolt lock monitoring system 10 mountable on a door. The deadbolt lock monitoring system 10 includes an insidethumb turn assembly 100 mountable on an inside face of the door, anoutside cylinder assembly 200 mountable on the outside face of the door, astrike plate assembly 300 mountable on a door jamb/frame, and alatch assembly 400 mountable through an edge of the door. - The inside
thumb turn assembly 100 includes aninside housing 110 with anRF window 115, a thumb-turn lever 120, a wireless communication chip/module 130 using Bluetooth® (e.g. Bluetooth® 5.0), related circuity with a microcontroller unit (MCU) or central processing unit (CPU) and computerreadable storage 135, anantenna 140, a battery 145 (e.g., a lithium-ion coin cell battery or other user replaceable off-the-shelf battery) as a power source, a light emitting diode (LED)indicator light 150 visible on the surface of theinside housing 110, areset button 155 accessible for actuation through asmall aperture 112 located on the outer surface of the inside housing, and aninside housing connector 160 to connect circuitry within theinside housing 110 with thelatch connector 485 of thelatch assembly 400 as further discussed below. The computer readable storage can include storing program code configured to retrieve or receive information from inputs and transit information. Additional detail regarding thelatch assembly 400 is provided below with respect toFIGS. 5-11B . - In some embodiments, the wireless communication chip/
module 130 can be a Bluetooth® transmitter. Alternatively, other communication methods, such as Wi-Fi®, can be envisioned. - The
LED light 150 can be in multiple colors to indicate locked and unlocked conditions. Alternatively, theLED light 150 can be a single color, turned either ON or OFF, to indicate the locked or unlocked condition. TheLED light 150 may also flash either to indicate a problem or to confirm a pairing process. - A
reset button 155 can be used in the initial pairing of the deadbolt lock monitoring system 10 to a remote wireless Bluetooth compatible electronic device, such as a smartphone, tablet, personal computer, security system, etc., or to restore the deadbolt lock monitoring system 10 to factory default conditions. - The
outside cylinder assembly 200 can include anoutside housing 210, aprotection shield 220, anoutside cylinder 240, and atailpiece 230 coupled to theoutside cylinder 240. Thetailpiece 230 can extend through a cam (not shown) of the latch assembly and can engage the thumb-turn lever 120. Thetailpiece 230 can rotate when theoutside cylinder 240 is turned with a key or when the thumb-turn lever 120 is operated by a user. Rotation of thetailpiece 230 in one direction can rotate the cam of thelatch assembly 400 to extend a deadbolt of thelatch assembly 400, and rotation of thetailpiece 230 in an opposite direction can rotate the cam to retract the deadbolt, as explained in further detail below. The deadbolt of thelatch assembly 400 can extend into thestrike plate assembly 300 to secure the door in a closed position and in a locked state. Theoutside cylinder assembly 200 can first be attached to the mountingplate 190 of the insidethumb turn assembly 100. - The
latch assembly 400 can extend through the edge of the door and is partially exposed by a hole extending through the inside and outside surface of the door. Theprotection shield 220, which may also be known as an anti-pry shield, extends at least partly into the hole to prevent a tool from access to thelatch assembly 400. Theoutside housing 210 can fit over theprotection shield 220. The protective shield may have an outer rim seated against or adjacent to the perimeter of the hole on the outside face of the door. A pair of fasteners can be inserted through the inside housing and threaded into theoutside cylinder 240 to draw theoutside cylinder assembly 200 and the inside thumb-turn assembly 100 together against the outside and inside faces of the door, respectively. More specifically, theoutside cylinder 240 can urge theoutside housing 210 towards the door to secure theprotection shield 220 between the door and theoutside housing 210 thereby covering or preventing access to the fasteners or thelatch assembly 400. When assembled, the deadbolt can be retracted to an unlocked state and extended to a locked state by turning the thumb-turn lever 120 inside the door or by turning a key (not shown) inserted into theoutside cylinder 240 from outside the door. - The
RF window 115 of theinside housing 110 can accommodate RF transmission from theantenna 140. The shape of theinside housing 110 can be generally cylindrical, rectangular, or any other suitable shape. The inside cavity of theinside housing 110 is large enough to house at least one of the wireless communication chip/module 130, related circuity to connect with theCPU 135, theantenna 140, thebattery 145, theLED indicator light 150, thereset button 155 accessible for actuation through a small aperture located on the outer surface of theinside housing 110, and theinside housing connector 160. -
FIG. 6 illustrates an exploded view of components of the deadbolt lock monitoring system. Thestrike plate assembly 300 can extend into the door jamb and can include adust box 310, areinforcement plate 320, and astrike plate 330. Thestrike plate 330, when installed to the door jamb, can be generally flush with the surface of the door jamb. The reinforcedplate 320 can typically be much stronger than thestrike plate 330. Generally, two very long screws are passed through openings on opposite sides of the reinforcedplate 320 and thedust box 310, and into a wooden stud outside the door frame to make it more difficult for a person to kick the door open. Shorter screws may not extend deep enough into the stud to prevent the shorter screws from being ripped away from the door jamb. Regular short fasteners can then be used to attach the strike plate to the door jamb against thereinforcement plate 320. Other suitable fastening elements or device may suggest themselves for the above-described purposes to those skilled in the pertinent arts. - A
channel 301 can extend through an opening of thestrike plate 330, an opening of thereinforcement plate 320, and an opening of thedust box 310 into acavity 315 of thedust box 310 to allow the deadbolt of thelatch assembly 400 to fully extend into thedust box 310. Preferably, the deadbolt, when fully extended, should loosely fit through thechannel 301 through thestrike plate 330, thereinforcement plate 320, and thedust box 310. - A
magnet 350 may advantageously be attached to the inside or outside a bottom opposite the opening of thedust box 310 to trigger a magnetometer or magnetic sensor in thelatch assembly 400. As discussed below, the magnetometer or magnetic sensor, if present, can be located within the deadbolt. However, the magnetometer or magnetic sensor may also be located inside theinside housing 110 or form a part of the inside thumb-turn assembly 100, such as the lever. - The deadbolt can be close to or in contact with the
magnet 350 only when the deadbolt is fully extended, so that the magnetic sensor within the deadbolt can detect the presence of themagnet 350 when the deadbolt is fully extended. If nodust box 310 is used, thedust box 310 does not have a bottom, or the design dictates themagnet 350 be placed elsewhere, such as a side of thedust box 310, then themagnet 350 can be positioned anywhere adjacent the latchingassembly 400, so long as the magnetic sensor can detect the magnet when the deadbolt is fully extended and the door is closed, or simply when the door is closed. - The
latch assembly 400 can include alatch housing 410, afaceplate subassembly 401 comprising anadjustment casing 404 having ahelical slot 405 coupled to thehousing 410, afaceplate adapter 406 fixed to theadjustment casing 404, and afaceplate 402 attached to the faceplate adapter, adeadbolt 430 and adriver 450 coupled together and slidable within thelatch housing 410, and alatch cam 470 for moving thedeadbolt 430 relative to thelatch housing 410 between an unlocked position and a locked position by rotation of thelatch cam 470. - The
driver 450 can include a hollow first (cylindrical)portion 451 and a second (longitudinal)portion 455 extending away thecylindrical portion 451. Achannel 452 may extend in a helical fashion a half revolution around the cylindrical portion for adjusting the position of the deadbolt relative to the driver as discussed further below. This can allow thelatch assembly 400 to be fitted on doors having a different backset, which is the distance between the edge of the door and the center of the lock hole on the door. Thechannel 452 may also be a through-hole. - A
slot 456 may be defined in thelongitudinal portion 455 of thedriver 450 for receiving a tail of thelatch cam 470 to drive thedeadbolt 430 between the locked position and the unlocked position. Adriver guide 457 extending from thedriver 450 can be slidably captured in a driver guide slot 412 of thehousing 410 to ensure thedriver 450 moves in a linear direction. Thedriver guide 457 may also activate a switch in the fully extended and/or fully retracted position detailed below. -
FIGS. 6-8 illustrate the various components of an embodiment of thedeadbolt assembly 400. Thelatch cam 470 includes acylindrical body 471 and atail 475 extending from thecylindrical body 471 into theslot 124. Thecylindrical body 471 can rotate inside a pair ofcircular holes 414 of thelatch housing 410. Theholes 414 are aligned along a rotation axis. Thecylindrical body 471 has a slot through which thetailpiece 230 of theoutside cylinder assembly 200 extends. The rotation of the thumb-turn lever 120 or rotation of a key inserted in theoutside cylinder 240 causes thetailpiece 230 to rotate, which then causes thelatch cam 470 to rotate. Thelatch cam 470 rotates thetail 475 towards the direction of thedeadbolt 430 until it presses against an edge of theslot 456 in thedriver 450 to move thedriver 450 to extend thedeadbolt 430. The latch cam can be rotated until the deadbolt is fully extended to a locking state. Rotation of the latch cam to rotate the tail in a direction away from the deadbolt causes the tail to press against an opposite edge of the slot in the driver to urge the driver to retract the deadbolt. Movement of thedriver 450 also moves thedriver guide 457. In the locked state with the deadbolt fully extended, thedriver guide 457 can contact a first switch. In some embodiments, in the unlocked state with the deadbolt fully retracted, thedriver guide 457 can contact a second switch. - The
deadbolt 430 has an internal cavity 432 with an opening 431 at a first end and a throughhole 435 at an opposite second end. Thecylindrical portion 451 of thedriver 450 extends axially through the opening 431 and into the internal cavity 432. A securing pin 440 extends laterally through a sidewall of thedeadbolt 430 and directly into thechannel 452 of thedriver 450 to couple thedeadbolt 430 to thedriver 450. With the pin 440 secured to thedeadbolt 430, thedeadbolt 430 can rotate spirally about thedriver 450 as the pin 440 slides inside thechannel 452 to adjust the backset. At the same time, thefaceplate subassembly 401 rotates spirally about thelatch housing 410 guided by a protrusion on a surface of thelatch housing 410 inside thehelical slot 405. Thus, the face of thedeadbolt 430 is maintained at the same position relative to thefaceplate 402 regardless of the desired backset. - A
proximity sensor 480, such as magnetometer or a magnetic (e.g., Hall effect) sensor, may be fixed within the through hole of the deadbolt and flush or slightly recessed from a surface of the deadbolt. If a magnetic sensor is used, it is configured to detect the presence of a magnetic field, and it can be combined with other components to form a Hall effect switch. For example, when the magnetic flux from the magnetic field passing through themagnetic sensor 480 exceeds a preset value, the output switches quickly between an “OFF” condition to an “ON” condition without any contact bounce. Built-in hysteresis can eliminate any oscillation of the output signal as the magnetic sensor moves in and out of the magnetic field. If thedeadbolt 430 is in the fully extended position and is engaged in thestrike plate assembly 300, the magnet located at or near the first end of themagnetic sensor 480 will trigger the Hall effect switch to indicate that the door is closed shut and locked. If the deadbolt is in the locked position but not engaged in thestrike plate assembly 300, the Hall effect switch would remain in the “OFF” condition, indicating the door is not closed. Simply, if the magnetic sensor encounters a magnetic field, a closed door is detected, and if no magnetic field is encountered, an open door is detected. Themagnetic sensor 480 may be protected by aprotective housing 481, which, in turn, may be surrounded by ananti-cut roller 483 to prevent hacking thedeadbolt 430. When someone uses a hack saw to cut the deadbolt, eventually it will reach theroller 483, usually made of steel, whereby the roller will spin, so as to impede hacking further. Aspring 484 can bias theroller 483 away from thedriver 450 in order to maintain its position to prevent hacking. - A
wired connector 485 of themagnetic sensor 480 can be routed from inside the internal cavity of thedeadbolt 430 out the opening and through thecylindrical portion 451 of thedriver 450 and thelatch housing 410. The wired connector can include a wire to a power supply (e.g., +5 VDC), a ground return, and a signal wire. The signals through the signal wire can be an output voltage proportional (e.g., half) to the voltage between the power supply and ground. Agrommet 482 can prevent wires of themagnetic sensor 480 from damage against thelatch housing 410 as thedeadbolt 430 retracts and extends. - Instead of using a magnetic sensor as a proximity sensor, as described above, other types of proximity sensors could be used, such as a contact sensor, a capacitive sensor, or an optical sensor. The modifications needed to accommodate these alternative proximity sensors will readily suggest themselves to those skilled in the pertinent arts.
- The
battery 145 can supply power to the at least onecontact switch 490, theproximity sensor 480, the light 150, theCPU 135, and the other electrical components. The output signals from the contact switches 490 and theproximity sensor 480 can be processed in the CPU to determine and control the appropriate color of the light 150 as explained below. -
FIGS. 7 and 8 illustrate sectional views of thelatch assembly 400, in which the proximity sensor is amagnetic sensor 480, as described above.FIG. 7 illustrates a view in an unlocked, or retracted, state, andFIG. 8 illustrates a view in a locked, or extended, state. InFIG. 7 , the deadbolt is in the fully retracted state, such that thesensor 480 is spaced apart from themagnet 350. In this state, themagnetic sensor 480 is in a state that does not meet the predetermined threshold value for indication of a locked state. InFIG. 8 , the deadbolt is in the fully extended state, such that themagnetic sensor 480 is at a closest position to themagnet 350. In this state, the magnet located at or near the first end of themagnetic sensor 480 will provide a sufficient magnetic reading by the magnetic sensor to meet the predetermined threshold value to indicate that the door is closed shut and locked. -
FIGS. 9A and 9B illustrate perspective and plan views of thelatch assembly 400 in a fully extended state. As shown inFIGS. 5-10B , at least onecontact switch 490, which acts as a sensor when activated, can be used in combination with a Hall effect switch (as described above) to reduce false readings and to provide additional information. Thecontact switch 490 can be positioned adjacent to or within thehousing 410, such that thedriver guide 457, which is slidably received in the driver guide slot 412 of thelatch housing 410, can activate thecontact switch 490 when thedeadbolt 430 is in the fully extended position. As shown, thecontact switch 490 can be mounted on aswitch support 495, which is attached to thehousing 410. A connector for thecontact switch 490 can be shared with thewired connector 485 for the magnetic sensor. Thewired connector 485 can be passed through the mountingplate 190 for connection with theinside housing connector 160. -
TABLE 1 Hall contact effect Status switch switch Door Secured? 1 ON OFF No, door ajar 2 OFF OFF No, deadbolt not extended 3 OFF ON No, deadbolt not extended and error because this combination is not possible 4 ON ON Yes, deadbolt extended and door closed - As shown in Table 1, the combination of the
contact switch 490 and the Hall effect switch can sufficiently determine the status of the door. Only when thecontact switch 20 and the Hall effect switch are activated or switched to the “ON” condition, is the door fully secured with thedeadbolt 110 fully extended inside thestrike plate assembly 300. To conserve power, the deadbolt monitoring system 10 can be operated so that power is supplied to the Hall effect switch after thecontact switch 20 is activated. To detect if the door is closed with the door remaining in an unlocked state, a “check” can be performed by thedeadbolt 430 being temporarily thrown to the locked position and quickly withdrawn back to the unlocked position to determine if the Hall effect switch registers the magnet in the strike plate assembly. -
FIGS. 10A and 10B illustrate perspective and plan views of thelatch assembly 400 in a fully retracted state. In embodiments, asecond contact switch 490 can be provided for indication of a fully retracted state. As shown inFIGS. 10A and 10B , thesecond contact switch 490 can be located adjacent to or within thehousing 410, or supported by theswitch support 495 such that thedriver guide 457 can activate thefirst contact switch 490 when thedeadbolt 430 is in the fully retracted position. Thus, if neither of the contact switches 490 is activated, then thedeadbolt 430 is in an intermediary location, neither fully retracted nor fully extended. In this situation, an error is determined. Moreover, the time it takes to change from one position to the other may indicate that the battery is low, or that a motor, if present, is failing, or that there is undesirable friction in the deadbolt, or that other electrical or mechanical problems may be present. -
FIGS. 11A and 11B illustrate perspective and plan views of the deadbolt lock monitoring system in an assembled state. - In exemplary embodiments, the deadbolt lock monitoring lock system can be interfaced with a user's electronic device through program code, or an application (“APP”). Before, during, or after installation of the deadbolt lock monitoring system to the door, the initial pairing set up can begin with the user first downloading the APP to the remote wireless communication electronic device or devices, e.g. smartphone, tablet, personal computer, or security system. The APP may advantageously provide a simple user interface or a screen display showing the status (Locked or Unlocked) of one or more deadbolt locks as defined/described by the user during the initial set-up of the APP. The APP display can also show the Charge status of the
battery 145 for each deadbolt that has been previously paired with the smartphone/tablet and that is within wireless connectivity range. - The APP can be program code configured to access a connection with the deadbolt lock monitoring system. The APP can then either automatically receive information from the deadbolt lock monitoring system, or send a query to retrieve the information. The APP can then display the information through the user interface of the electronic device.
- To assemble the deadbolt monitoring lock system, an installer can install the key cylinder assembly portion of the deadbolt lock on the exterior side of the door. The next step is to confirm the
tailpiece 230 is properly inserted and oriented to move thedeadbolt 430 between the extended (locked) and retracted (unlocked) positions freely and without binding or excessive torque on the key to actuate the deadbolt's movement. Next, the contact switch(es) 490 may be positioned and secured to thesupport bracket 495. One or more fasteners may be used to ensure each of theswitches 490 is securely affixed to thelatch housing 410. - The next step is to pass the
first connector 485 from thecontact switch 490 and thesensor 480 through an opening in a mountingplate 190, and install fasteners (e.g., concealed screws) through the holes in mountingplate 190 to secure theoutside cylinder assembly 200 to the door. - The inside
thumb turn assembly 100, having been previously paired to the remote wireless device(s), is next secured to the mountingplate 190 on the door by snapping onto the mountingplate 190 or by one or more fasteners (not shown). - The next step is to attach the thumb-
turn lever 120 to a shaft protruding through theinside housing 110, if necessary. - After the deadbolt assembly portion is installed, the user can then launch the APP on the remote wireless device and then press the reset button in the enclosure housing to initiate the paring process. The APP will then guide the user through the pairing process.
- The LED indicator light may be operable either to flash in a certain color and/or flash in a predetermined sequence to indicate when the lock is in a “pairing” mode, and when the pairing is successfully accomplished.
- In operation, a user can use an electronic device, such as a phone, tablet, personal computer, or security system to run an application for interfacing with the deadbolt lock monitoring system. Multiple devices can be interfaced with the system. Embodiments may provide for an intermediary electronic device, such as a security system, which can then relay the status of the deadbolt lock monitoring system to additional electronic devices. Initial pairing of the electronic device and the deadbolt lock monitoring system is described in further detail below. After the deadbolt assembly portion is installed, the user can use the application on the electronic device to interface with the deadbolt lock monitoring system. For initial set up, there can be a
reset button 155 provided with thehousing 110 to initiate the pairing process. At least one of the application of the electronic device or theindicator light 150 can provide guidance to the user through the pairing process. For example, theindicator light 150, can flash in a certain color and/or flash in a predetermined sequence to indicate when the lock is in “Pairing” mode and when the Pairing is successfully accomplished. - When the
deadbolt 430 is fully extended, which corresponds to a locked position of the deadbolt, thesensor 480 and theswitch 490 are triggered (activated). The triggered switch can then send a signal indicating a change of the internal status (Unlocked) of the lock to “Locked.” When the deadbolt's position is changed (retracted or partially or fully retracted), thesensor 480 and theswitch 490 are no longer activated. When the sensor and the switch are no longer triggered, the internal status of the lock is changed to “Unlocked.” Therefore, whenever there is an internal status change, regardless of whether the status changed to “Locked” or “Unlocked,” a transmission of the new status can broadcast to all paired electronic devices. This can be done via the application for all electronic devices within communication range of the deadbolt. This transmission can be configured to occur whenever the lock status has changed and regardless if any paired devices are within range. The LED indicator light 150 can either change colors, or illuminate (or un-illuminate) depending on the status of the lock. - At any time, when the user and a paired electronic device are within communication range of the lock, the user can open the application on the electronic device, such as a smartphone or tablet, and query the lock of its status. Alternatively, if the lock is connected to a security system with an external connection, such as via the internet, the user may access the status from any location. As mentioned above, the status of the deadbolt's condition/position may only provide a notification of its current status to the paired device via the application, and the application may optionally be configured to allow the user to use the electronic device to issue commands to the lock other than inquiring about the lock's current status.
- In the case where the deadbolt monitoring lock system uses a battery power source, the system can provide a battery state update. Whenever the battery state of change falls to a predetermined level or threshold (e.g. starting at 100% and stepping down in either 5% or 10% increments), a notification of a “Battery Status,” indicating the status of the battery, will be transmitted whenever the status of the lock is changed or whenever the user query the lock for its status. So in other words, when the battery reaches the next battery level (in 5% or 10% increments), that is, whenever the status of the lock is changed or the user query for the lock status, in addition to broadcasting the lock status, an updated notification of the battery status will also be transmitted to the paired devices via the application.
- In some embodiments, when the battery charge level is at predetermined minimum threshold (e.g. at 5% battery remaining), the LED indicator light 150 can either change to a different color and/or flash in a pre-determined pattern to indicate that the battery is low and needs replacing.
- Embodiments of the disclosure can thus provide a method of remotely determining the locked or unlocked status of a lock latch. The method can include receiving information related to the position of the lock latch from a position detector, determining whether the lock latch is in a locked or an unlocked state from the information, and transmitting the determined locked or unlocked state through a transmitter to a remote electronic device. The method can include, wherein the information from the position detector comprises a position signal having a first value when the detected position of the lock latch is in the unlocked state and a second value when the detected position of the lock latch is in the locked state.
- Although limited embodiments of the deadbolt monitoring locking system, its components, and related methods have been specifically described and illustrated herein, many modifications and variations will be apparent to those skilled in the art. Furthermore, it is understood and contemplated that features specifically discussed for one embodiment may be adopted for inclusion with another embodiment when appropriate. Accordingly, it is to be understood that the deadbolt monitoring locking system, its components, and related methods constructed according to principles of the disclosed devices and methods may be embodied other than as specifically described herein. The disclosure is also defined in the following claims.
Claims (20)
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US15/831,094 US20180155959A1 (en) | 2016-12-02 | 2017-12-04 | Deadbolt latch assembly with latch sensor having wireless status indicator |
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US201662429447P | 2016-12-02 | 2016-12-02 | |
US15/831,094 US20180155959A1 (en) | 2016-12-02 | 2017-12-04 | Deadbolt latch assembly with latch sensor having wireless status indicator |
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US20180155959A1 true US20180155959A1 (en) | 2018-06-07 |
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US15/831,094 Abandoned US20180155959A1 (en) | 2016-12-02 | 2017-12-04 | Deadbolt latch assembly with latch sensor having wireless status indicator |
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